摘要：
首先科普下Pivoting的含义 一般翻译为“主元”,在对矩阵做某种算法时,首先进行的部分元素.在线性规划的单纯形法中常见.wiki的解释如下：Pivot element（the first element distinct from zero in a matrix in echelon form 阅读全文
It's not who you are underneath, it's what you do that defines you
Brick walls are there for a reason :they let us prove how badly we want things